The deep EGS (Enhanced Geothermal System) project at Soultz-sous-Forêts (Alsace, France)

Gérard, André; Genter, Albert; Köhl, Thomas; Lutz, Philippe; Rose, Peter; Rummel, F.

doi:10.1016/j.geothermics.2006.12.001

Cited by 163 publications

(96 citation statements)

References 18 publications

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“…We consider a five-spot "generic" EGS injection-production system with parameters patterned after the European hot dry rock project at Soultz/France (Gérard et al 2006). The reservoir is treated as a two-dimensional areal system (Fig.…”

Section: Modeling Approachmentioning

confidence: 99%

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

2009

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Correlations are presented to compute the mutual solubilities of CO 2 and chloride brines at temperatures 12-300 • C, pressures 1-600 bar (0.1-60 MPa), and salinities 0-6 m NaCl. The formulation is computationally efficient and primarily intended for numerical simulations of CO 2 -water flow in carbon sequestration and geothermal studies. The phase-partitioning model relies on experimental data from literature for phase partitioning between CO 2 and NaCl brines, and extends the previously published correlations to higher temperatures. The model relies on activity coefficients for the H 2 O-rich (aqueous) phase and fugacity coefficients for the CO 2 -rich phase. Activity coefficients are treated using a Margules expression for CO 2 in pure water, and a Pitzer expression for salting-out effects. Fugacity coefficients are computed using a modified Redlich-Kwong equation of state and mixing rules that incorporate asymmetric binary interaction parameters. Parameters for the calculation of activity and fugacity coefficients were fitted to published solubility data over the P-T range of interest. In doing so, mutual solubilities and gas-phase volumetric data are typically reproduced within the scatter of the available data. An example of multiphase flow simulation implementing the mutual solubility model is presented for the case of a hypothetical, enhanced geothermal system where CO 2 is used as the heat extraction fluid. In this simulation, dry supercritical CO 2 at 20 • C is injected into a 200 • C hot-water reservoir. Results show that the injected CO 2 displaces the formation water relatively quickly, but that the produced CO 2 contains significant water for long periods of time. The amount of water in the CO 2 could have implications for reactivity with reservoir rocks and engineered materials.

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Section: Modeling Approachmentioning

confidence: 99%

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

2009

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“…Geotermalne visokotemperaturne sisteme z rezervoarjem z umetno ustvarjeno prepustnostjo ozna~ujemo s kratico EGS (GéRaRD et al, 2006;GenteR et al, 2008;GosaR & Ravnik, 2007). Oznaka združuje razli~ne sisteme: vro~e suhe kamnine (HDR, angl.…”

Section: Egs -Izbolj{ani Geotermalni Sistemiunclassified

“…Evropski HDR projekt Soultz-sous-Forêts je bil leta 2001 preimenovan v EGS projekt, saj so ugotovili, da razpokane granitne kamnine v podlagi sedimentov Zgornjerenskega jarka vsebujejo veliko vro~ega slanega fluida (GéRaRD et al, 2006). Projekt se je odvijal ve~fazno, vklju~no z vrtanjem {tirih globokih vrtin.…”

Section: Egs -Izbolj{ani Geotermalni Sistemiunclassified

“…S po{evno vrtino zajeta termalna voda v dolomitu in dolomitnem apnencu se izrablja tudi za daljinsko ogrevanje. Vodonosne kamnine so zadostne debeline in blizu prelomne cone, zato zna{a pretok 18 l/s, njena temperatura na ustju vrtine pa 105 °C (GolDBRunneR, 2005). S 5-stopenjsko potopno ~rpalko so pretok pove~ali do najve~ 100 l/s, s tem da toplotno izrabljeno vodo vra~ajo v vodonosnik.…”

Section: Binarne Geotermalne Elektrarneunclassified

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Possibilities for electricity production from geothermal energy in Slovenia in the next decade

Rajver¹,

Lapanje²,

Rman³

2012

Geologija

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Klju~ne besede: geotermalni visokotemperaturni vir, geotermalna elektrarna, hidrotermalni vir, HDR, EGS, termi~na u~inkovitost, naftna in plinska industrija, severovzhodna Slovenija, Panonski bazen.Key words: high temperature resources, geothermal power plant, hydrothermal resources, HDR, EGS, thermal efficiency, oil and gas industry, Northeastern Slovenia, Pannonian basin Izvle~ek lanek je namenjen ozave{~anju zainteresirane javnosti s ciljem, da lahko vsak presodi resni~nost in pravilnost zapisov, ki se o možnostih izrabe geotermalne energije pojavljajo v medijih. Obravnava namre~ celovit pregled geotermalnih sistemov, potencial hidrotermalnih in izbolj{anih geotermalnih sistemov, nadalje mehanizme in zna~ilnosti srednje-do visokotemperaturnih geotermalnih virov ter na~in njihove pretvorbe v elektriko. Predstavljeni so glavni elementi, ki vplivajo na uspe{nost pretvorbe geotermalne v elektri~no energijo. Podana sta pregled potrebnih raziskav za ugotovitev geotermi~nega potenciala in ocena tehnolo{kih ter ekonomskih možnosti postavitve geotermalnih elektrarn v Sloveniji. Pri tem je opisano stanje poznavanja srednje-in visokotemperaturnih geotermalnih virov v Sloveniji z za~etnimi pogoji za postavitev geotermalne elektrarne. Poleg tega podajamo teoreti~ne izra~une izkoristka pretvorbe geotermalne energije v elektri~no s klasi~nimi turbinami in navajamo pogoste teža-ve pri izkori{~anju geotermalne energije, ki so povezane z dodatnimi stro{ki in znižujejo u~inkovitost investicije. Opisane so lastnosti ter u~inkovitost binarnih geotermalnih elektrarn in tuje izku{nje pri pridobivanju elektrike iz EGS (izbolj{ani geotermalni sistem, angl. Enhanced Geothermal System). Obravnavamo tudi prekrivanje delovanja naftne in plinske industrije z delovanjem EGS ter uporabnost naftnih in plinskih vrtin za proizvodnjo geotermalne elektrike. AbstractThis article is intended to raise awareness of the public, with the aim that anyone can judge reality and accuracy of records that appear in the media on the exploitation of geothermal energy. It provides a comprehensive overview of geothermal systems, potential of hydrothermal and enhanced geothermal systems, of mechanisms and characteristics of middle and high enthalpy geothermal resources. It also deals with a mode of their conversion into electricity. Featured are the main factors affecting the decision on effectiveness of conversion of geothermal energy into electricity. Given are the review of the research necessary to establish the geothermal potential and assessment of technological and economic possibilities of installing geothermal power plants in Slovenia. The paper also describes the state of knowledge of middle-and high temperature geothermal resources in Slovenia with initial conditions for constructing geothermal power plants. In addition, we present theoretical calculations of the conversion efficiency of geothermal energy into electricity with conventional turbines and present some problems for the exploitation of geothermal energy, which are associated with additiona...

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“…A large scientific and industrial community has been involved in developing Enhanced Geothermal Systems (EGS) for the last 20 years (e.g. Gérard et al, 2006;Calcagno & Sliaupa, 2008). This concept involves different tracks for enlarging access to heat at depth by improving exploration methods, drilling and reservoir assessment technology for deep geothermal resources, and the stimulation of low permeability reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Rock specific hydraulic fracturing and matrix acidizing to enhance a geothermal system — Concepts and field results

et al. 2011

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The deep EGS (Enhanced Geothermal System) project at Soultz-sous-Forêts (Alsace, France)

Cited by 163 publications

References 18 publications

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

Possibilities for electricity production from geothermal energy in Slovenia in the next decade

Rock specific hydraulic fracturing and matrix acidizing to enhance a geothermal system — Concepts and field results

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